The renewable energy sources are those sources of energy which are inexhaustible and available everywhere in abundance. These energy sources do not cause pollution and are regarded as the ‘clean’ energy sources. More and more countries have turned up towards using these resources i.e. the sun, wind, water, biogas, etc. The costs of sustainable energy sources are also decreasing day by day because of innovations.
The major difference between renewable and the conventional energy forms i.e. fossil fuels is that they are more abundant, diverse with many different options and they can be used anywhere on the planet. The conventional forms emit greenhouse gases leading to global warming which is at present is a major threat. If you see costs, then the price of using sustainable sources are constantly falling because of latest innovations whereas the prices of fossil fuels are soaring high. So many companies started moving towards renewable systems. That’s really a good changeover. Even energy experts like Douglas Healy says that such changeover is expected to maintain equilibrium in the current polluted ecosystem.
Types of Renewable Energy
Wind energy– the energy obtained from the wind
Solar energy– the energy obtained from the sun. The main technologies used to tap solar energy are solar photovoltaic (using the light from the sun) and solar thermal (using the sun’s heat)
Hydraulic or hydroelectric energy– energy obtained from running water i.e. rivers and other freshwater currents
Biomass and biogas– energy extracted from organic material
Geothermal energy– heat energy from inside the Earth
Tidal energy– energy obtained from the tides
Wave energy– energy obtained from ocean waves
Bioethanol– it is the organic fuel suitable for vehicles and is obtained from fermentation of vegetation
Biodiesel– it is also organic fuel for vehicles and obtained from vegetable oils
Advantages of Clean Energies
Helps fight against climate change– the renewable energy sources are called clean energies since they do not emit greenhouse gases in energy generation processes. Thus they can play a vital role in preventing our environment from pollution.
Inexhaustible form of energy– the conventional energy sources like coal, gas, oil are finite and once used can’t be replenished. Whereas the sustainable energy sources such as wind, water, sun is inexhaustible. They will always be available that is why everyone is seeing it as a most promising future energy source.
Reduced energy dependence– more and more use of clean energy sources has lessened our dependence on the non-renewable sources of energy. Earlier countries had to import fossil fuels which added to their economic burden and they found it difficult to meet even the short-term energy goals. But with renewable energy sources wind, water, sun, biomass you need not to take them from anywhere else, they are already present everywhere in abundance.
Highly competitive– The main renewable technologies like wind and solar photovoltaic are drastically reducing their costs so that they can compete with the conventional sources of energy. More and more countries are making them self-sufficient in their energy needs with the help of these sustainable energy sources. And with more and more innovations taking place in this field which is making it economically sustainable.
Favorable political horizon– the benefits of various decisions from different countries worldwide is directly have on more and more use of sustainable energy sources. Decisions adopted at COP21 have shone the spotlight on renewable energies. The international community has stood firmly for the transition towards a low-carbon economy in order to guarantee a sustainable future for our mother earth. International consensus has reached in favor of the “de-carbonization” of the economy. All these developments have led towards constituting a very favorable framework for the promotion of clean energy technologies.